Prenancy complications and maternal body mass index (BMI)
| BMI 35+ | BMI 18.5–24.9 | OR | CI | |
|---|---|---|---|---|
| Hypertension: pre-existing | 8.9 | 2.1 | 4.6 | 4.0 to 5.4 |
| PIH/PET | 9.6 | 3.3 | 3.2 | 2.7 to 3.7 |
| Prematurity | ||||
| <34 | 2.0 | 1.8 | 1.1 | 0.9 to 1.5 |
| <37 | 7.1 | 5.8 | 1.2 | 1.1 to to 1.4 |
| IUGR (<10th customised centile) | 18.6 | 13.2 | 1.5 | 1.4 to 1.7 |
| Caesarean Section | 36.1 | 19.2 | 2.4 | 2.2 to 2.6 |
| Apgar | ||||
| <4 @ 1 min | 2.6 | 1.7 | 1.5 | 1.2 to 1.9 |
| <7 @ 5 min | 1.7 | 1.2 | 1.4 | 1.0 to 1.9 |
| Admission to neonatal unit | 3.2 | 1.9 | 1.7 | 1.3 to 2.2 |